Examine the chain of infection and the labels below. Which examples could match the labels A, B, C, and D in the diagram?

A could be a human; B could be a virus; C could be the nose; D could be the mucus membranes of the eyes

Explanation:

In relation to infections by viruses, humans could be the host that the virus infects and grows in like the coronavirus. Viruses can enter into the body via the mucus membranes in the eyes especially when we touch them with our hands if our hands have come into contact with a virus.

After the virus has replicated in large enough numbers and spread to other parts of the body, we are able to infect others through portals of exit such as the nose and the mouth when we sneeze.

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so i really think that most of the health care industry be doing more bad than good.